Smoothing device.



A. HOPHBIMER.V

sMooTHING DEVICE. AIPLIOATION IILEDDSO. 8, 1910.

Patented July 11,1911.

2 SHEETS-SHEET 1.

IIIIIA.

www1/hola I wm www A. HOFHEIMER Patented July 11, 1911.

2 SHEETS-SHEET 2.

HNI,

` N1TED-sTArEs PTNT OFFICE.

. ARTHUR Hemmings; Vor Yann-PENNSYLVANIA, AssrGNoR fro HEA'NY FIREPROQF WIRE comme?, or NEW Yemen. Y., CORPORATION ort-PENNSYLVANIA:

s'MooTHrNG. DEVICE.

y To all whom t; may concern:

Be it lknown' that I, ARrHrRHorH'nrMnn,

a citizenof the-United States, residing at York, 'in the county of York and State of Pennsylvania have 'invented certain new and useful-Improvements 1n Smoothing Devices, of wluch 4the .following 1s a specifica-- tion` Myinventionrelates to ariapparatus -tor sn'ioothingor ironing down a coating of 1nsulatin-g material during the process of applying -such material to electricaljconductors, and has .for its object to enable .the

production of va smooth-polished coating on" an Iinsulated Wire .which shall be of uniform gage.

'In the drawings- Figure 1 is a side elevation .of the devicegand Fig. 2 is an end elevation.'

. My invention is particularly applicable to that method of insulating ,wires which are to be.l used as electrical conductors, in which a layer of insulatingmaterial such-as cu'lent asbestos is first applied to the Wire, 25.

andthere is then applied vover the fibrous coa'tinga layer of some plastic insuluating material such' as` an asphaltic paint or varnish. My device vis intended to remove any vto a uniform gage or diameter. These results* are produced `by passing lthe coated Wire, which may or may not berevolving on itsi'axis', longitudinallythrough or between lower and upper die-bars 7 andv 9 which diesfmay be groovedif desired. i 'The die-bar 7, shown as a long'bar, is

'carried 'onsupporting frames 2, 2, which are in tur'n mounted on brackets 1', l, secured to any suitable -fraine (not shown). To these supporting frames Q, .2 .is secured a roof- -shaped hood 3 which mavhave its side `ledges' upturned as at 4 to form grooves or gutters for receiving the surplus material removed fromfthe Wireby lthe dies.. its apex, the vhood 3 lhas openings 6, 6. through which theheating gases pass into a chamber formed between the main, hood 3 and a supplemental' hood 5, these heating gases being supplied from a burner tube located beneath the hood. .As shown the burner tubes are supplied with gas and air through a mixingr valve which maybe of any usual construction'.

l l a 'specification of Letters Patent.. Application led December 8. 1910. Serial No. 596,269.

Near.

.Paten-ted July 11, 1911..

I- Y1,?ivoted to the hood lyis a series of plates 1 1 (three being shown, though more may be' used 1f desired), each plate carrying a burner tub'earranged to direct h'ot gases.

downward. Die-bars 9, 9, are securedin place in thesey plates .by bolts'lO, andthe Vloiver die-'bari' is similarly secured to'its support by pins 8. Hooks 13 screwed. into the plates 11 support, by means ofrods 1.4, weights. 15.

'In' operatiomthe Wire with its coatingof plastioinsulating material, as it passes .between' the'heated dies, is subjectedI to sufficientl pressure to causethe plastic material to permeate lthe interstices ofthe previouslyapplied librous material, while'- at. the"same time. .the surplus material is removed, the surface of the. coating material lsmoothed or ironed down, and the'wire brought tov a uni- -formgage `The needed pressure .can be obtained,as shown, by' means of we igh ts', or by equivalent means 'such as springs, the pressure-being regulated by applyingdif- Aferent Weights or by proper-adjustment of vthe springs if such are used. Thehood' 3 fpr'events the surplus material removed by` the 'dies from interfering with the operation of-'the burner, and the supplemental hood enables the hot gases to escape Without coming into contactjwith the surplus plastic, material as it passes' down4 overthe supplemental hood.-

By using in series severaldeviccs such as 'have been vabove described, various degrees `of heat maybe applied tothe 'coated Wire,

and by omitting the heat from the devices at. the end of the series,l such unheated de vices act as po'lishersto` give'a finished surface to the insulate'dwire.

Whatl claim is: 1.]Inv a Wire 'insulating device, an apparatus comprising a die, asupport-therefor consisting of an angular hood, and a burnerl located beneath said hood.

2. In a Wire insulatingsdevice, 'an appa? ratus comprising a die, a support "therefor consisting of an angular hood having perforations4 near its apex, a supplemental hood over said=perforations, and a burner located beneath the hoods. 3. In a Wire insulating device, an apparatus comprising a die, la support therefor consisting of an angular hood having uplocated beneath said-hood; a

a series of longitudinally extended upper dies arranged over said lower die, means for applying heat to said upper dies, and means @In a wire insulating device, an apparatus comprising upper and lower dies, a

supportfor the ylower die, means for heating 'said die, a carrier pivoted to the lower for applying a ylelding pressure the1eto. 15 5l diefsupport, the upper die being mounted on In testimony whereof, I alflx my signature said'. carrier, mefans for heating id upper in presence of two witnesses. f

die', and means or applying a yie ing pressure to the upper` die carrier. ARTHUR HOFHEIMER" 5. In a wire insulating device, an appa- J0 ratus comprisingalongitudinally extended I lower die, means for applying heat thereto, I

Witnesses:

GEO. W. DEWEY, F. A. R HOFFEDITZ. 

